Brief Summary:
In this study, the investigators aimed to compare the effects of different types of endotracheal instruments (Machintosh laryngoscope, McGrath videoingoscope and C-Mac videoryngoscope) on intraocular pressure, optic nerve diameter and hemodynamic parameters.
Who can participate
Age range
18 Years – 65 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Non-ophthalmic surgery
* Mallampati I or II classifications
* American Society of Anesthesiologists (ASA) I-II
Exclusion Criteria:
* Glaucoma,
* Diabetes mellitus,
* Cardiovascular diseases,
* Pulmonary diseases,
* ASA 3 and 4
* Body Mass Index (BMI) greater than 30
* Eye surgery
* Difficult intubation (Mallampati score of 3 or 4, thyromental distance of less than 6 cm and a maximum mouth opening of less than 3 cm)
* Intraocular pressure value more than 20 mmHg
* More than two intubation attempts
* A risk of regurgitation patients
* History of obstetric surgery
* Allergies to propofol, fentanyl or rocuronium
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Intraocular pressure-1
Timeframe: Intraocular pressure will be measured at before induction
2
Intraocular pressure-2
Timeframe: Intraocular pressure will be measured at just before laryngoscopy and intubation
3
Intraocular pressure-3
Timeframe: Intraocular pressure will be measured at immediately after intubation
4
Intraocular pressure-4
Timeframe: Intraocular pressure will be measured at 5 minutes after intubation
5
Intraocular pressure-5
Timeframe: Intraocular pressure will be measured at 10 minutes after intubation